Botany. 225 



DIVISION C. \LGfc. 

 Section I __ SALTWATER OR MARINE 



Quite a number of marine Algae (Fucus vesiculosus, Ulva, etc.) 

 ascend the estuary of the Thames as far as Gravesend, and a few 

 perhaps beyond, but we have no records. The shore from the 

 Isle of Grain to Gravesend should be explored. 



Section II. FRESHWATER ALG/t. 



The records for our districts are scanty and principally derived 

 from the following sources : 



1. RUDOLF BEER, F.L.S., Bromley Naturalists' Society, 



1883-1894 and 1 900-1 901 ," for the Bromley and 

 Keston districts. 



2. L.C.C. BOTANY DEPARTMENT, Avery Hill, 1906-1907, 



for the Eltham district. 



The arrangement and, as far as possible, the nomenclature are 

 those of the " British Freshwater Alga," by G. S. West, 1904. 



Class I RED U(. I (RhodophyceaB). 



BATRACHOSPERMUM moniliforme, Roth. Keston: now diffi- 

 cult to find, owing to the cleaning out of Caesar's Well, in 

 which it formerly grew. 



Class II. BROWN ALG/t (Phaeophyceae). 



(No records.) 



Class III. CHARALES. 



(See CHARACE^E, Hanbury and Marshall's Flora.) 



CHARA hispida, L. Bromley (J. Groves). 



C. vulgaris, L. Plumstead Marshes, Bromley (J. Groves) ; pond by 

 the roadside between Eltham and Chislehurst (Dod) ; 

 ditches in the Thames flats (1877) ; Long Pond, near brick- 

 field, Eltham, '07, L.C.C. 



C. vulgaris, var. longibracteata, Klitz. Plumstead Marshes near 

 Abbey Wood ; between there and Crossness (Dod) ; pond. 

 near Sherden Farmhouse, Edenbridge (Salmon) ; ditch, 

 Swanscombe Marshes, 1901, W.H.G. 



C. vulgaris, var. pappillata, Wallr. Common in dykes near the sea. 

 Plumstead Marshes (Groves) ; marshes between Abbey 

 Wood and Crossness (Dod). 



TOLYPELLA glomerata, Leonh. Very rare ; Plumstead Marshes, 

 1875, Jackson and H. & J. Groves (a first record). 



